#include <syscall.h>

#include <bits/types.h>

#include <bits/fcntl.h>

#include <bits/signal.h>

#define SFD_NONBLOCK O_NONBLOCK

#define SFD_CLOEXEC O_CLOEXEC

struct sigevent {

uint32_t signo;

int32_t errno;

int32_t code;

uint32_t pid;

uint32_t uid;

int32_t fd;

uint32_t tid;

uint32_t band;

uint32_t overrun;

uint32_t trapno;

int32_t status;

int32_t intval;

uint64_t ptrval;

uint64_t utime;

uint64_t stime;

uint64_t addr;

uint16_t addr_lsb;

byte pad[46];

} __attribute__((packed));

inline static long sys_sigaction(int signum, const struct sigaction* act, struct sigaction* oldact)

{

return syscall4(NR_rt_sigaction, signum, (long)act, (long)oldact, sizeof(sigset_t));

}

inline static long sys_sigprocmask(int how, const sigset_t* set, sigset_t* oldset)

{

return syscall4(NR_rt_sigprocmask, how, (long)set, (long)oldset, sizeof(*set));

}

inline static long sys_kill(int pid, int sig)

{

return syscall2(NR_kill, pid, sig);

}

inline static long sys_signalfd(int fd, sigset_t* set, int flags)

{

return syscall4(NR_signalfd4, fd, (long)set, sizeof(*set), flags);

}